JPH11209915A - Sand containing artificial turf playground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To finely adjust a bound characteristic of a ball of a sand containing artificial turf tennis court by forcedly bringing down the direction of a turf of artificial turf, and executing the turf direction outward or inward to a net. SOLUTION: A turf A is set so as to be brought down in one direction by applying a bar to the tip of pile 4a when heated by applying a backing material after implanting the pile 4a in base cloth of artificial turf 4. The artificial turf 4 is stuck to a tennis court so that the direction of the turf A becomes symmetrical to the lengthwise direction of division areas 2, 3 with a net 1 as a boundary. The introduction of sand by a sand scattering machine and pile brushing by a reversely rotating brush are performed so that half or more of the whole frequency becomes the turf A direction. The pile 4a is forcedly brought down in the constant direction by rolling/heating it in the stage of execution work when using ordinary artificial turf. A bound characteristic of a ball can be delicately adjusted according to the need of a player by setting the direction of the turf A outward or inward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial turf playground with sand used for tennis competitions and the like.

[0002]

2. Description of the Related Art For example, in a tennis competition, playability such as ball bounce on a court surface and slipperiness of shoes is a very important performance for a player.

[0003] Surface finishing materials for tennis courts include clay, untuckers, rubber chips, paints (hard)
There are various types such as system, natural grass, artificial turf with sand, etc.
Each has different playability.

[0004] Among them, an artificial turf coat containing sand in which artificial sand made of a material such as polypropylene and made of a pile (leaf stem) having a length of about 19 mm is filled with sand is an all-weather coat having excellent drainage and maintenance properties. Yes, and since it has a feeling of play similar to clay courts that have been widely used,
It has spread rapidly in the country since the year.

Generally, artificial turf containing sand is disclosed in Japanese Patent Application Laid-Open No. 4-106.
It has been considered important to prevent the artificial turf surface from having directionality as described in JP-A-203. Therefore, when constructing a tennis court made of sand-containing artificial turf, as shown in FIG. 3, the artificial turf 11 is laid in one direction from one end to the other end with respect to the longitudinal direction of the court, and the pile 11a of the artificial turf 11 is removed. By raising (standing) and putting sand, the grass of the artificial turf 11 is erased. In the sandbox, a sand brush is applied to the artificial turf using a sand spreader, and a rotating brush is rotated in a direction opposite to the traveling direction of the sand blaster to spread the sand while standing up a pile. And so on. In this sanding process, sand is put in order from the base of the pile while rotating a reverse rotating brush of a little over 1 m, and the same place is put in 7-8.
Sprinkle the eyes sand back and forth about once. Then, in order to smooth out the unevenness during that time, the brush moves back and forth several times with a non-rotating straight brush (usually having hairs planted in parallel), and brushes a total of 10 times or more.

[0006]

However, the artificial turf court with sand has the disadvantage that the ball bounce is slightly higher than the clay court and the ball does not run (the ball foot is slower). There was a problem that lacked the real pleasure. In particular, soft tennis players (formerly known as soft tennis players) have traditionally played games on clay courts, so even sand-containing artificial turf courts have the same playability as clay courts (especially ball-bounding). The demands for improvement were pointed out.

[0007] The present invention has been made in view of such circumstances, and an object of the present invention is to provide an artificial turf playing field with sand that further improves playability of a game.

[0008]

[MEANS FOR SOLVING THE PROBLEMS] Even with artificial turf containing sand, the playability of the game, especially the ball bounce property, depends on the pile material of the artificial turf (polypropylene, nylon, etc.), the thickness of the pile, the thickness of the pile, and the planting density. Or the shape of the sand,
It is known that there is a slight difference depending on the grain size, thickness, etc., but in the present invention, we focus on the fact that the ball bouncing properties differ slightly depending on the grass texture of the artificial grass, and consciously use the grass texture Thus, the playability of the competition is further improved.

[0009] That is, in an athletic field in which artificial turf containing sand is laid, at least two regions having partially different grasses are provided using artificial grass having grasses in a certain direction.

[0010] According to the above configuration, it is possible to obtain a playability that meets the needs of the player by finely controlling the ball bound characteristics by the grass.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the embodiment shown in FIG.

FIG. 1 shows a case where the present invention is applied to an artificial turf court containing sand in a tennis competition. This sand-containing artificial turf coat has a center in the longitudinal direction of the coat, that is, 2
The texture (A) is allocated outward (in a direction away from the net 1) so as to be symmetrical with respect to the longitudinal direction of the court with the net 1 sandwiched between the two divided regions 2 and 3. I have.

For the artificial turf coat with sand of the present invention, an artificial turf having a lawn emphasizing in a certain direction is used. For this reason, artificial turf is handled with emphasis on grass lawn from the time of manufacture to winding and packaging. That is,
In the manufacturing process of artificial turf, a large number of piles are planted on the base fabric by tufting or the like, a backing material for fixing the pile is applied to the back surface of the base fabric, and this is heated and dried. As shown, the pile 4 of the artificial turf 4 being moved
The bar 4 or the roll 5 is brought into contact with the tip of the pile a to forcibly tilt the pile 4a in one direction to set the grass. Furthermore, when the artificial turf 4 is rolled up and packed, it is strongly wound in the direction of the grass (the direction in which the pile 4a is lying down), so that the pile 4a is tilted down and the grass is set more strongly. However, if the grass of the artificial grass 4 is too strong, in other words, if the pile 4a of the artificial grass 4 is too collapsed,
Since it hinders sand insertion at the time of construction, it is better to actually set the grass to such an extent that the pile 4a is slightly down compared to the conventional product.

In the construction of the artificial turf coat with sand of the present invention, the artificial turf 4 having the grass in a certain direction is placed in the partition areas 2 and 3 on both sides of the net 1 with the grass facing outward, that is, in the net. 1 are laid in such a way as to move away from the artificial turf 1, and sanding and brushing are performed so as to leave the texture set on the artificial turf 4 so that the net 1 is symmetrical with respect to the longitudinal direction of the coat. An artificial turf coat with sand with grass (A) facing outward is constructed.

The sand pitting and brushing of the present invention is performed in the same process as the conventional sand pitting and brushing, but attention is paid to the running direction and the brushing direction of the sand blasting machine so as to leave the grass set on the artificial turf 4. . That is, the sander travels in the same direction as the grass direction, and sand is filled with a reverse rotation brush or pile brushing is performed with a straight brush, and the traveling and brushing frequency in that direction is more than half of the total number of times. It will be constructed to be. In addition, when sand is used, the reverse rotation brush is used in the same manner as in the prior art.
The reason for this is that if the pile 4a is not lying down, the sand does not enter uniformly.

Although the above is a method of using artificial turf in which grass is emphasized in a certain direction in advance, even when using artificial turf in which grass is not emphasized, the artificial turf is compacted at the construction stage. A similar effect can be obtained by forcibly tilting the grass in a certain direction by heating and / or heating. This method is a rolling machine using a roller or an iron with a device capable of heating the rolling surface to 80 ° C. to 150 ° C. and a rolling machine used for asphalt pavement such as a Macadam roller, a tandem roller, and a vibration compactor. This is performed during or after the sanding and brushing steps or after finishing to forcibly lower the grass in a certain direction.

According to the artificial turf court with sand of the present invention, the grass (A) is provided outward on both sides of the net 1 so as to be symmetrical with respect to the longitudinal direction of the court, so that it can be used in competition. In addition, the coefficient of friction against the ball became smaller due to the grass (A), the ball bound became slightly lower, and the ball moved (the ball foot was faster). This makes it possible to obtain a playability close to a clay court, particularly a ball-bounding property, thereby satisfying the real thrill of a tennis game.

Next, Table 1 below shows the results of test hits (answers based on comparative examples) by 20 tennis players regarding the ball bounce properties of the artificial turf court containing sand of the present invention.

[0019]

[Table 1]

[Example 1] An artificial turf coat with sand in which grass is laid outward (toward the direction away from the net) so as to be symmetrical with respect to the longitudinal direction of the coat with the net interposed therebetween.

[Example 2] An artificial turf coat with sand in which grass is allocated inward (toward the direction approaching the net) so as to be symmetrical with respect to the longitudinal direction of the coat with the net interposed therebetween.

[Comparative Example] An artificial turf coat with sand whose grass was erased by sand pitting.

From Table 1, it was found that the ball bounce characteristics were slightly different depending on the grass. In Example 1, it was found that the ball became slippery and a low-eye, fast ball bounce was obtained. It can be seen that the skidding is slightly suppressed and a high-eye slow ball bounce is obtained.

The present invention is not limited to the tennis court of the above-described embodiment, but is also applicable to a sports field used for a game of playing in a divided area divided into symmetrical play zones via a net or the like. It is possible.

[0025]

As described above, according to the present invention,
Contrary to the past, we actively used the grass and finely adjusted the ball bound characteristics according to the grass,
It is possible to control well the playability (ball-bound property) that meets the needs of the player. Therefore, in the case of a court used for soft tennis, if the grass is laid out outwardly so as to be symmetrical with respect to the longitudinal direction of the court across the net, a low-ball fast-bounce property can be obtained and a play close to the clay court can be obtained. It can satisfy the real pleasure of a tennis competition with a sense of speed and sex.

[Brief description of the drawings]

FIG. 1 is a plan view (a) and a longitudinal sectional view (b) of an artificial turf coat containing sand according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a manufacturing process of the artificial turf.

FIG. 3 is a plan view (a) and a longitudinal sectional view (b) of a conventional artificial turf coat with sand.

[Explanation of symbols]

 1 Net 2, 3 Area 4 Artificial turf 4a Pile 5 Bar or roll A Grass

[Procedure amendment]

[Submission date] January 12, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

That is, in a sand-filled artificial turf playground in which artificial turf having a lawn in a certain direction is laid, the grass is symmetrical with respect to the longitudinal direction with respect to the longitudinal center or the net portion of the playground. The feature is that artificial turf is laid in the direction of inward or inward.

Claims (5)

[Claims] 1. An artificial sand-filled artificial turf in which at least two regions having different grass-grain portions are provided in an athletic field on which artificial sand-containing artificial turf is laid. Turf playground. 2. The artificial turf is laid by laying the grass outward or inward so as to be symmetric with respect to the longitudinal direction across the longitudinal center or the net portion of the playground. Item 1. The artificial turf playground containing sand of item 1. 3. An artificial turf in which a pile of artificial turf is forcibly tilted in one direction to emphasize a lawn from a backing step to a winding step in the production of the artificial turf. Artificial grass field with sand. 4. The method according to claim 1, wherein, during or after the sanding and brushing steps, the grass is forcibly knocked down in a certain direction by rolling and / or heating to emphasize the grass. 1 or 2 sandy artificial grass playground. 5. In the sanding and brushing step, sanding and brushing are performed by traveling in the same direction as the grass direction, and the frequency of sanding and brushing in the traveling direction is at least half of the total number of times. The artificial turf playground containing sand according to any one of claims 1 to 4, wherein the artificial turf is used for sand.